The act of praising oneself for an achievement or success.

आत्म-संतोष

English Usage: After winning the award, his self congratulation was evident as he spoke about his achievement for hours.

Hindi Usage: पुरस्कार जीतने के बाद, उसकी आत्म-संतोष जाहिर थी क्योंकि वह घंटों तक अपनी उपलब्धियों के बारे में बात करता रहा।